Electronic apparatus, device and method for adjusting a parameter for a proximity-based service communication

ABSTRACT

An electronic apparatus, an information processing device and an information processing method. An electronic apparatus for a base station side includes a processing circuit. The processing circuit is configured to: control a user equipment to acquire, from a base station, reference information about a signal intensity on a specific spectrum resource in a predetermined region; when the user equipment is located in the predetermined region, control the user equipment to sense the signal intensity on the specific spectrum resource; and control the user equipment to adjust, based on the reference information and the sensed signal intensity, a parameter for performing near-distance service communication in the predetermined region, so as to achieve an expected communication performance, wherein the parameter influences the access rate and/or transmission reliability of near-distance service communication.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a continuation of U.S. application Ser. No.16/067,336, filed Jun. 29, 2018, which is based on PCT filingPCT/CN2017/081206, filed Apr. 20, 2017, which claims priority to CN201610319282.0, filed May 13, 2016, the entire contents of each areincorporated herein by reference.

FIELD

The present disclosure generally relates to the field of wirelesscommunications, and in particular to an electronic device, informationprocessing apparatus and information processing method for userequipment side, as well as an electronic device, information processingapparatus and information processing method for base station side.

BACKGROUND

The proximity-based service (ProSe) communication in the cellularnetwork, such as device-to-device (D2D) communication, generally refersto a service in which user data is transmitted directly betweenterminals and not relayed via a network during the transmission process.In particular, as a typical scenario of the internet of thingsapplication, the D2D communication may include vehicle-to-vehicle (V2V)communication, and the like.

Taking the V2V communication as an example, the V2V communication may beused, for example, for the driving security management of the inside ofa vehicle system and between a vehicle and another vehicle in closeproximity of the vehicle, to reduce the frequency of traffic accidents.Currently, by the V2V communication, vehicle-mounted communicationapparatuses are connected to the network, and the vehicle-mountedcommunication apparatuses transmit and share information via thenetwork, so that the vehicle driving security can be improved. Theintelligent transportation system (ITS) workgroup of the europeantelecommunication standards institute (ETSI) and the IEEE 802.11pworkgroup have proposed corresponding intelligent transportationtechnology standards. The LTE-A of the 3rd generation partnershipproject (3GPP) has also started doing research on vehicle-to-everything(V2X) projects supported by the long term evolution (LTE). The internetof vehicles is mainly intended to ensure that the vehicle driving stateor accident warning information can be reliably and rapidly exchangedbetween vehicles, thereby ensuring the driving security and reducing theaccident impact.

SUMMARY

Brief summary of embodiments of the present disclosure is givenhereinafter, to provide basic understanding for certain aspects of thepresent disclosure. It should be understood that, the summary is notexhaustive summary of the present disclosure. The summary is notintended to determine key parts or important parts of the presentdisclosure, and is not intended to limit the scope of the presentdisclosure. An object of the summary is only to give some concepts ofthe present disclosure in a simplified form, as preamble of the detaileddescription later.

According to an embodiment, an electronic device for user equipment sideis provided. The electronic device includes a processing circuit. Theprocessing circuit is configured to: control the user equipment toacquire from a base station, reference information of a signal intensityover a specific spectrum resource in a predetermined area; control theuser equipment to sense the signal intensity over the specific spectrumresource in a case that the user equipment is located in thepredetermined area; and control the user equipment to adjust, based onthe reference information and the sensed signal intensity, a parameterfor performing proximity-based service communication in thepredetermined area, to achieve a desired communication performance. Theparameter affects an admission rate and/or a transmission reliability ofthe proximity-based service communication.

According to another embodiment, an information processing apparatus foruser equipment side is provided. The information processing apparatusincludes a transceiving device and a processing circuit. The processingcircuit is configured to: control the transceiving device to acquirefrom a base station, reference information of a signal intensity over aspecific spectrum resource in a predetermined area; control the userequipment to sense the signal intensity over the specific spectrumresource in a case that the user equipment is located in thepredetermined area; and control the user equipment to adjust, based onthe reference information and the sensed signal intensity, a parameterfor performing proximity-based service communication in thepredetermined area, to achieve a desired communication performance. Theparameter affects an admission rate and/or a transmission reliability ofthe proximity-based service communication.

According to another embodiment, an information processing method foruser equipment side is provided. The information processing methodincludes: acquiring, from a base station, reference information of asignal intensity over a specific spectrum resource in a predeterminedarea; sensing the signal intensity over the specific spectrum resourcein a case that the user equipment is located in the predetermined area;and adjusting, based on the reference information and the sensed signalintensity, a parameter for performing proximity-based servicecommunication in the predetermined area, to achieve a desiredcommunication performance. The parameter affects an admission rateand/or a transmission reliability of the proximity-based servicecommunication.

According to another embodiment, an electronic device for base stationside is provided. The electronic device includes a processing circuit.The processing circuit is configured to: control the base station toacquire movement information (including a position, a movementdirection, a movement speed, or a target movement route) of a targetuser equipment; and control the base station to transmit to the targetuser equipment, reference information of a signal intensity over aspecific spectrum resource in a predetermined area and/or a referencevalue of a parameter for performing proximity-based servicecommunication, if it is determined based on the movement informationthat the target user equipment is about to enter the predetermined area.

According to another embodiment, an information processing apparatus forbase station side is provided. The information processing apparatusincludes a transceiving device and a processing circuit. The processingcircuit is configured to: control the base station to acquire movementinformation of a target user equipment; and control the transceivingdevice to transmit to the target user equipment, reference informationof a signal intensity over a specific spectrum resource in apredetermined area and/or a reference value of a parameter forperforming proximity-based service communication, if it is determinedbased on the movement information that the target user equipment isabout to enter the predetermined area.

According to another embodiment, an information processing method forbase station side is provided. The information processing methodincludes: acquiring movement information of a target user equipment; andtransmitting, to the target user equipment, reference information of asignal intensity over a specific spectrum resource in a predeterminedarea and/or a reference value of a parameter for performingproximity-based service communication, if it is determined based on themovement information that the target user equipment is about to enterthe predetermined area.

With the embodiments of the present disclosure, even in an area that isnot covered by a network infrastructure signal, the user equipment canautonomously perform the parameter adjusting to improve the admissionrate and/or transmission reliability of the target service.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure can be understood better with reference to thedescription given in conjunction with the drawings in the following. Thesame or similar element is indicated by the same or similar referencenumeral throughput all the drawings. The drawings are included in thedescription together with the following detailed illustration and form apart of the description, and are used to further illustrate preferredembodiments of the present disclosure and explain principles andadvantages of the present disclosure by examples. In the drawings:

FIG. 1 is a block diagram showing a configuration example of anelectronic device for user equipment side according to an embodiment ofthe present disclosure;

FIG. 2 is a block diagram showing a configuration example of anelectronic device for user equipment side according to anotherembodiment of the present disclosure;

FIG. 3 is a block diagram showing a configuration example of aninformation processing apparatus for user equipment side according to anembodiment of the present disclosure;

FIG. 4 is a flowchart showing a process example of an informationprocessing method for user equipment side according to an embodiment ofthe present disclosure;

FIG. 5 is a block diagram showing a configuration example of anelectronic device for base station side according to an embodiment ofthe present disclosure;

FIG. 6 is a block diagram showing a configuration example of anelectronic device for base station side according to another embodimentof the present disclosure;

FIG. 7 is a block diagram showing a configuration example of aninformation processing apparatus for base station side according to anembodiment of the present disclosure;

FIG. 8 is a flowchart showing a process example of an informationprocessing method for base station side according to an embodiment ofthe present disclosure;

FIG. 9 is a block diagram showing a configuration example of anelectronic device for user equipment side according to an embodiment ofthe present disclosure;

FIG. 10 is a block diagram showing a configuration example of aninformation processing apparatus for user equipment side according to anembodiment of the present disclosure;

FIG. 11 is a block diagram showing a configuration example of anelectronic device for base station side according to an embodiment ofthe present disclosure;

FIG. 12 is a block diagram showing a configuration example of aninformation processing apparatus for base station side according to anembodiment of the present disclosure;

FIG. 13 is a schematic diagram illustrating an example process performedbetween a base station and a user equipment according to an embodiment;

FIG. 14 is a schematic diagram illustrating an example process performedbetween a base station and a user equipment according to an embodiment;

FIG. 15 is a schematic diagram illustrating an example process performedbetween a base station and a user equipment according to an embodiment;

FIG. 16 is a schematic diagram illustrating a failure rate estimatingprocess;

FIG. 17 is a schematic diagram illustrating an example process performedbetween a base station and a user equipment according to an embodiment;

FIG. 18 is a block diagram of an exemplary structure of a computer forimplementing the method and the device according to the presentdisclosure;

FIG. 19 is a block diagram showing a schematic configuration example ofa smart phone to which the technology of the present disclosure may beapplied;

FIG. 20 is a block diagram showing a schematic configuration example ofan evolution node base station (eNB) to which the technology of thepresent disclosure may be applied; and

FIG. 21 is a block diagram showing a schematic configuration example ofa car navigation apparatus to which the technology of the presentdisclosure may be applied.

DETAILED DESCRIPTION OF EMBODIMENTS

Embodiments of the present disclosure are described below with referenceto the drawings. Elements and features described in one drawing or oneembodiment of the present disclosure may be combined with elements andfeatures illustrated in one or more other drawings or embodiments. Itshould be noted that, for clarity, indication and description ofcomponents and processing irrelevant to the present disclosure and knownby those skilled in the art are omitted in the drawings and theillustration.

As shown in FIG. 1, an electronic device 100 for user equipment sideaccording to an embodiment includes a processing circuit 110. Theprocessing circuit 110 may be implemented as, for example, a specificchip, a chipset, a central processing unit (CPU).

The processing circuit 110 includes an acquiring unit 111, a sensingunit 113 and an adjusting unit 115. It should be noted that, althoughthe acquiring unit 111, the sensing unit 113 and the adjusting unit 115are shown as functional blocks in FIG. 1, it should be understood thatfunctions of the acquiring unit 111, the sensing unit 113 and theadjusting unit 115 may be implemented by the processing circuit 110 as awhole and are not necessarily implemented by actual discrete componentsin the processing circuit 110. In addition, although the processingcircuit 110 is shown by one block in FIG. 1, the electronic device 100may include multiple processing circuits, and the functions of theacquiring unit 111, the sensing unit 113 and the adjusting unit 115 maybe distributed to the multiple processing circuits so that the multipleprocessing circuits operate in coordination to implement the functions.

The acquiring unit 111 is configured to control the user equipment toacquire reference information of a signal intensity over a specificspectrum resource in a predetermined area from a base station.

The predetermined area may be, for example, an area not covered by acommunication network to which the user equipment belongs, so that theuser equipment can autonomously perform related operations as describedbelow based on the acquired reference information in the case of beingnot covered by the network. However, the present disclosure is notlimited thereto. The above-described predetermined area may be setaccording to specific applications, and the predetermined area mayinclude an area covered by the network. In other words, the userequipment may also autonomously perform the related operations based onthe acquired reference information in the case of being covered by thenetwork.

The specific spectrum resource may include, for example, a spectrumresource assigned to vehicles communication (corresponding to a casethat the user equipment is a vehicle) or a spectrum resource over anunlicensed frequency band.

The signal intensity over the specific spectrum resource may reflect adensity or the number of other user equipments operating over thespecific spectrum resource. In a case that the current user equipmentperforms proximity-based service communication by using the specificspectrum resource in a target area, the other user equipments serve asinterference sources of the proximity-based service communication. Thereference information may reflect or include a predeterminedcorrespondence between a reference value of a parameter and the signalintensity over the specific spectrum resource to meet a predeterminedadmission rate and/or transmission reliability of the proximity-basedservice communication over the specific spectrum resource. The referenceinformation may include, for example, a maximum signal intensity that istolerable by the user equipment in a case that the user equipmentoperates with a current reference value of the parameter and thepredetermined admission rate and/or transmission reliability of theproximity-based service communication over the specific spectrumresource is met.

The proximity-based service communication may include, for example,machine type communication (MTC), device-to-device (D2D) communication,vehicle-to-everything (V2X) communication, and internet of things (IOT)communication. The V2X communication may include vehicle-to-vehicle(V2V) communication, vehicle-to-pedestrian (V2P) communication,vehicle-to-infrastructure (V2I) communication, and the like.

The reference information may be held and maintained by the basestation. The base station may acquire the reference information invarious ways. For example, the base station may estimate the referenceinformation in the predetermined area based on historical data (e.g.,the number of user equipments, the distribution of the user equipments,the usage of spectrum resources, and the signal intensity) of the entirenetwork. Alternatively, the base station may acquire a position andmovement information of the user equipment that the base station servesto obtain the number of vehicles entering in the predetermined area, andthen estimates the reference information by using a normal servicemodel. Alternatively, the user equipments may respectively storemeasurement results in the target area by themselves, and report themeasurement results to base stations in the case of being covered by asignal, and the measurement results may be shared among the basestations, so that the base station at the edge of the predetermined areacan determine the reference information based on the measurementresults.

The sensing unit 113 is configured to control the user equipment tosense the signal intensity over the specific spectrum resource in a casethat the user equipment is located in the predetermined area.

As described above, the reference information acquired from the basestation under control of the acquiring unit 111 is, for example, anestimated value of the signal intensity in the predetermined area thatis obtained based on the historical data or statistical data, and thesignal intensity sensed under control of the sensing unit 113corresponds to an actual measured value. The sensing unit 113 controls,for example, the user equipment to perform signal sensing by usingenergy sensing or feature detection.

The adjusting unit 115 is configured to control the user equipment toadjust a parameter for performing proximity-based service communicationin the predetermined area based on the acquired reference informationand the sensed signal intensity, to achieve a desired communicationperformance. The parameter affects an admission rate and/or atransmission reliability of the proximity-based service communication.

The parameter for performing the proximity-based service communicationin the predetermined area may include, for example, one or more of aclear channel assessment (CCA) threshold for accessing the specificspectrum resource, a frequency and/or the number of times oftransmitting messages by using the proximity-based servicecommunication, and a signal transmission power of the proximity-basedservice communication.

The CCA threshold and the frequency/the number of times of transmittingthe message may affect the admission rate of the proximity-based servicecommunication, and the signal transmission power may affect thetransmission reliability of the proximity-based service communication.More specifically, in a case that an interference intensity is constant,a high CCA threshold or a high frequency of transmitting the messagecorresponds to a high admission probability of the user equipment forthe proximity-based service communication. Similarly, in the case thatthe interference intensity is constant, a strong signal transmissionpower corresponds to a high transmission reliability of theproximity-based service communication.

In addition, the reference information may include a maximum signalintensity that is tolerable by the user equipment in a case that thepredetermined admission rate and/or transmission reliability of theproximity-based service communication over the specific spectrumresource is met by using a current parameter (for example, a defaultparameter set by the user equipment or a reference parameter notifiedfrom the base station).

For the case of notifying the reference parameter from the base station,in an implementation, the processing circuit 110 may be furtherconfigured to control the user equipment to acquire a reference value ofthe parameter from the base station. The reference value of theparameter is determined, for example, by the base station side based ona reference signal intensity in the predetermined area and a targetadmission rate and/or transmission reliability of the proximity-basedservice communication. That is, in a case that the signal intensity(interference intensity) in the predetermined area is the referencesignal intensity and the user equipment operates with the referenceparameter, the target admission rate and/or transmission reliability canbe met.

The adjusting unit 115 may be configured to adjust the parameter with anoffset obtained based on the reference information and the sensed signalintensity. As described above, the reference information acquired by theacquiring unit 111 corresponds to the estimated value of the signalintensity (a potential interference level) in the predetermined area,and the sensing unit 113 senses an actual signal intensity. Therefore,the parameter may be offset based on a difference between the sensedsignal intensity and the reference information, so that the targetadmission rate and/or transmission reliability can still be met at anactual interference level.

In addition, target admission rates/transmission reliabilities fordifferent resource pools of the proximity-based service communicationmay be different, or relationships between the admissionrates/transmission reliabilities and interference intensities may bedifferent. Accordingly, the reference value of the parameter may be setindividually for different resource pools.

In addition, an adjusting range for the parameter may be limited. In animplementation, the adjusting unit 115 is configured to adjust theparameter in a predetermined range. A case that the CCA threshold servesas the parameter is taken as an example. For example, an upper limit anda lower limit of the CCA threshold may be set. For example, in a casethat the upper limit of the CCA threshold is reached, the CCA thresholdis not further increased even if the target admission rate is not met.

For example, in a case that multiple systems or operators coexist, theadjusting range for the parameter may be agreed to avoid a case that theCCA threshold is excessively increased in order to achieve respectivetarget admission rates, or a case that the signal transmission power isexcessively increased in order to achieve respective transmissionreliabilities.

In addition, the proximity-based service can include portions ofdifferent service priorities. Taking the V2X communication as anexample, the communication related to security may have a high priority,the communication for a traffic jam message may have a medium priority,and the communication for an advertisement message may have a lowpriority.

In an implementation, the adjusting unit 115 may be configured to adjustthe parameter based on a service priority of the proximity-based servicecommunication, such that the admission rate and/or transmissionreliability of a high priority service reaches a predetermined level. Inother words, the admission rate and/or transmission reliability of thehigh priority service is preferentially ensured.

In addition, in an implementation, the sensing unit 113 and theadjusting unit 115 may perform the sensing and adjusting operationsperiodically or only in a case that a predetermined triggering conditionis met. For example, the sensing and adjusting operations may betriggered in a case that no spectrum resource for the proximity-basedservice communication is found in a preset time period.

Next, an example embodiment is described with reference to FIG. 13. Inthe example, the user equipment is a vehicle, the proximity-basedservice communication is V2X communication, and the parameter is a CCAthreshold. It should be understood that some aspects of the example mayalso be applied in other application scenarios.

FIG. 13 shows a schematic diagram of an information interaction processbetween a base station (eNB) or a roadside device (RSU) 1310 and a userequipment (UE) 1320.

In a process (1), the eNB/RSU 1310 determines based on movementcharacteristics (e.g., a vehicle speed and a direction) of the UE 1320(which is also referred to as a “target node” hereinafter) that the UE1320 is about to go beyond a signal coverage range of the eNB/RSU 1310and enter an area (which is also referred to as a “target area”hereinafter) not covered by a network signal.

In a process (2), the eNB/RSU 1310 transmits reference information of asignal intensity in the target area which the UE 1320 is about to enter,to the UE 1320. In this example, a density of user equipments in thetarget area reflects an interference signal intensity in the targetarea. Accordingly, the reference information may include an interferencesignal I received from a reference interference source by the targetnode, or transmitting information of the reference interference sourceand a channel model, as well as other information for CCA thresholdadjusting, such as a threshold of a reference CCA, a density ofcorresponding network nodes, and an adjusting offset for the referenceCCA.

In a process (3), the V2X UE 1320 performs density estimating in thetarget area based on signal measurements. The operation may be triggeredperiodically or in a case that no available resource is found in apreset time threshold.

In addition, in the process (3), the UE 1320 may select a resource poolcorresponding to a service, for example, select from preset availableresource pools, and perform a sensing operation on the selected resourcepool.

For example, a resource pool may be selected in the following way. Witha wide bandwidth under the same conditions, transmission rate can beincreased to reduce message transmission delay, and thus messagecollision probability can be reduced. The resource pools may be rankedin the descending order of a unit resource bandwidth to form a ringsequence starting from a resource pool with the widest unit bandwidth,and a resource pool may be selected for each service based on the ringsequence. In the resource pool selection process, the following featuresmay be considered individually or in combination.

(i) A priority of a service X may be considered, which is indicated byRank(X) and is generally characterized as a probability of obtaining aresource and a requirement on the transmission delay. A high prioritycorresponds to a high probability of obtaining an available channel andrequires a short message transmission delay. Accordingly, a resourcepool with a wide unit resource bandwidth is initially selected for aservice with a high priority, and a resource pool with a narrow unitresource bandwidth is initially selected for a service with a lowpriority.

(ii) A message length may be considered. A resource pool with a wideunit resource bandwidth is initially selected for a service with a longmessage length, and a resource pool with a narrow unit resourcebandwidth is initially selected for a service with a short messagelength.

(iii) A requirement for information reception may be considered. Anapparatus is generally equipped with only one set of transceivingdevices, resulting in only a half-duplex characteristic, i.e.,information reception and transmission cannot be performedsimultaneously. In a case that information transmitted by another UEarrives when the target UE is performing transmitting, the informationcannot be received due to the half-duplex characteristic. A solution tothe problem is to increase a bandwidth of the transmitting resource andreduce the required time. Accordingly, if the user equipment highlyneeds to receive messages from other network nodes, a resource pool witha narrow unit resource bandwidth is initially selected.

After a resource pool is selected, the UE performs signal sensing onresources in the resource pool. It is assumed that a sensed signalintensity of a target channel is E_(agg), and a clear channel assessmentthreshold is CCA_(Th). In the case of E_(agg)<CCA_(Th), the channel isconsidered as a clear channel and may be directly used. In the case thatno available resource is found in the preset time threshold, it isindicated that the interference is enhanced, and the clear channelassessment threshold CCA_(Th) may be reset. In this case, a sensedresult for another channel may be selected to perform the resetting. Achannel with a minimum signal intensity or a medium signal intensity maybe selected, or a channel may also be randomly selected, as a targetchannel.

It is assumed that the sensed signal intensity of the target channel isE_(agg), and a target node provided by the network receives aninterference signal I from a reference interference source. In thiscase, a density of the interference sources is estimated as

${n = \frac{E_{agg} - N}{1}},$

where N represents environment noise. Alternatively, the network mayprovide information of the reference interference source and a channelmodel, where a transmission power is p_(i), a channel coefficient ish_(i), a distance to the target node is d, and a path loss index is a Inthis case, an aggregation interference signal received by the targetnode is expressed as E_(agg)(n)=n*p_(i)h_(i)d^(−a)+N and the n may becalculated. ρ(n) indicates a density of nodes using the resource in thenetwork.

Next, in a process (4), the UE 1320 performs CCA threshold adjusting.

It is assumed that the clear channel assessment threshold correspondingto the density ρ(n) is CCA_(Th)(p(n)), an admission probability of thenode for the corresponding spectrum resource is calculated asP_(adm)=Pr(E_(agg)(n)<CCA_(Th)(ρ(n))). The E_(agg)(n) increases with then. That is, for a certain area, in a case that an average servicearrival rate of the users is constant, the aggregation interferenceincreases as the number of users increases, resulting in a decreasedadmission probability in a case that the CCA threshold is constant. Inorder to maintain the admission probability of a specific service orservice type constant, the CCA threshold is accordingly adjusted fordifferent services.

Taking the case of increasing an admission rate of a high-priorityservice and reducing an admission rate of a low-priority service as anexample, an adjusting strategy (the adjusting strategy may be notifiedby the eNB to UEs in advance, and the UEs adopt the unified adjustingstrategy) may be performed, for example, in the following manners.

In a first manner, the CCA threshold is increased for the high-priorityservice, and the CCA threshold remains constant for the low-priorityservice. In this manner, the CCA threshold can be more flexibly adjustedfor the high-priority service as needed, however, a density estimatingoperation and other operations are required to be performed in theadjusting process, which increases the calculation consumption.

In a second manner, the CCA threshold is decreased for the low-priorityservice, and the CCA threshold remains constant for the high-priorityservice. In this manner, operations for measuring and decreasing the CCAthreshold are performed by the UE that performs the low-priorityservice, the UE that performs the high-priority service do not need toperform the density estimating operation and other operations, therebyreducing the calculation consumption and access delay; however, theadmission rate of the high-priority service increases only in a casethat the aggregation interference decreases due to adjusting the CCAthreshold for the low-priority service.

In a third manner, the CCA threshold is increased for the high-priorityservice, and the CCA threshold is decreased for the low-priorityservice.

In a fourth manner, the CCA threshold is increased for both thehigh-priority service and the low-priority service, and the CCAthreshold is increased more rapidly for the high-priority service thanthe low-priority service.

In a fifth manner, the CCA threshold is decreased for both thehigh-priority service and the low-priority service, and the CCAthreshold is decreased more rapidly for the low-priority service thanthe high-priority service.

A specific adjusting process may be performed as follows. A adjustingoffset CCA_(bias) corresponding to a unit density change is preset.Taking the case of increasing the CCA threshold as an example, it isassumed that, a reference CCA threshold is CCA_(Th), a reference densitycorresponding to the reference CCA threshold is ρ_(Th), and a CCAthreshold corresponding to the density ρ(n) is

${{CCA}_{Th}\left( {\rho (n)} \right)} = {{CCA}_{Th} + {\frac{\rho (n)}{\rho_{Th}}{{CCA}_{bias}.}}}$

In addition, different adjusting offsets may be set for services withdifferent priorities. That is, CCA_(bias)(Rank(X)) is a function of aservice type Rank(X), and varies according to different service types.

It should be noted that, for a certain area, in a case that a density ofthe users is constant, the average interference increases as the averageservice arrival rate of the users increases, resulting in a decreasedadmission probability in a case that the CCA threshold is constant. Thesituation may be equivalent to a situation in which the density of theusers increases while the average service arrival rate is constant.

Next, another example embodiment is described with reference to FIG. 14.In the example, the user equipment is a vehicle, the proximity-basedservice communication is V2X communication, and the parameter is afrequency and/or the number of times of transmitting messages by usingthe proximity-based service communication. It should be understood thatsome aspects of the example may also be applied in other applicationscenarios.

As shown in FIG. 14, in a process (1), an eNB/RSU 1410 determines that aUE 1420 is about to enter a target area.

In a process (2), the eNB/RSU 1410 transmits to the UE 1420, referenceinterference source information for density estimating in the targetarea which the UE 1420 is about to enter, and reference informationrequired for message control adjusting. In the example, the referenceinformation includes a reference frequency and the reference number oftimes of transmitting messages, a density of corresponding networknodes, and reference adjusting offsets for the frequency and the numberof times of transmitting messages.

In a process (3), the UE 1420 performs density estimating in the areanot covered by the network based on signal measurements. The detailedprocess may refer to the process (3) described above with reference toFIG. 13.

In a process (4), the UE 1420 performs message control adjusting.Specifically, the frequency and the number of times of transmittingservice messages are adjusted to increase an admission rate of a targetservice. The frequency of transmitting messages refers to the number oftimes of transmitting messages per unit time, including the frequencyfor the same message and the frequency for different messages. Inaddition, the number of times of transmitting the same message may belimited. By increasing the frequency and the number of times oftransmitting messages, a resource occupancy rate of the service can beincreased. By reducing the frequency and the number of times oftransmitting messages, the resource occupation rate of the service canbe decreased, thereby increasing the admission rate of other servicesfor the same resource. In a case that the estimated density increases,in order to maintain the admission probability of a specific service orservice type constant, the frequency and the number of times oftransmitting messages is accordingly adjusted for different services.The specific adjusting strategy and manner may refer to the process (4)described above with reference to FIG. 13.

Next, another example embodiment is described with reference to FIG. 15.In the example, the user equipment is a vehicle, the proximity-basedservice communication is V2X communication, and the parameter is asignal transmission power. It should be understood that some aspects ofthe example may also be applied in other application scenarios.

As shown in FIG. 15, in a process (1), an eNB/RSU 1510 determines that aUE 1520 is about to enter a target area.

In a process (2), the eNB/RSU 1510 transmits reference interferencesource information for failure rate estimating and a target failure rateto the UE 1520.

In a process (3), the UE 1520 performs failure rate estimating in thearea not covered by the network based on signal measurements. Theoperation may be triggered in a timer triggering manner or in a casethat the interference signal measurement result changes. The failurerate estimating is performed based on density estimating to acquiren*p_(i)h_(i)d_(i) ^(−a) in a signal-to-interference and noise ratio SINR(Nd), or only the energy estimating is performed to acquire E_(agg)(n),which may be expressed as a sum of the interference and the noise, i.e.,E_(agg)(n)=n*p_(i)h_(i)d^(−a)+N

As shown in FIG. 16, it is assumed that, a signal source is Ns, atransmission power of the Ns is p_(s), a channel coefficient for the Nsis h_(s), a distance from a reference point Ni to the Ns is d, atransmission power of the reference point Ni is p_(i), and a channelcoefficient for the Ni is h_(i), and an effective signal rangecorresponding to the Ns service is A with the Ns as a center and r as aradius. In a case that a point in the A is denoted as Nd, asignal-to-interference and noise ratio of the Nd may be expressed as

${{SINR}({Nd})} = {\frac{p_{s}h_{s}d_{s}^{- \alpha}}{{n*p_{i}h_{i}d_{i}^{- \alpha}} + N}.}$

It is assumed that a signal-to-interference and noise ratio threshold ofa correct demodulated signal is SINR_(Th), the failure rate in theeffective range of the Ns service is estimated asP_(fail)=Pr(SINR(Nd)<SINR_(Th)|Ns∈A). The P_(fail) may indicate a ratioof the number of users who cannot correctly receive the Ns signal to thenumber of the total users in the range, where the users uniformlydistributed in the given range A.

In a process (4), the required power is calculated based on the targetfailure rate. Specifically, it is assumed that for a service X, afailure rate required for the service type Rank(X) is Pf(Rank(X)). In acase that a target transmission power is expressed asp_(s)=min{p_(s)|P_(fail)≤Pf(Rank(X))}, which indicates a minimumtransmission power meeting the target failure rate, the power may beadjusted based on the target transmission power corresponding to thetarget failure rate.

The example embodiments are described above in the case of the CCAthreshold, the frequency and/or the number of transmitting messages, andthe signal transmit power respectively serving as the adjustedparameter. It should be understood that the present disclosure is notlimited to the specific details in the above examples. For example, inthe above examples, the intensity of the interference signal in thetarget area is reflected with the density of the user equipments in thetarget area, but in fact, the parameter adjusting is performed stillbased on the intensity of a signal (as the interference source) over thespecific spectrum resource in the target area, to achieve the desiredcommunication performance.

In the foregoing embodiments, the target user equipment adjusts theparameter based on the reference information acquired from the basestation and the signal intensity sensed by the target user equipmentitself. However, in the case that the base station side can acquire theoperation state information of user equipments in the target area,including at least one of time information, position information andspectrum resource information, the base station side can determinemutual interference between the user equipments in the target area moreaccurately, so that the target user equipment can perform parameteradjusting only based on the information provided by the base stationside. In this case, the base station side needs to acquire correspondinginformation from the user equipments. The user equipments may transmitthe operation state information to the base station in a real-timemanner. In this case, the time when the state information is transmittedalso corresponds to the time when the spectrum resource is used.Alternatively, the user equipments may transmit the operation stateinformation to the base station after being covered by a network. Inthis case, the time information may indicate the time when the spectrumresource is used instead of the time when the state information istransmitted. In addition, the time information may include a timeinstant at which the spectrum resource is used or a time period duringwhich the spectrum resource is used.

As shown in FIG. 2, an electronic device 200 for user equipment sideaccording to another embodiment includes a processing circuit 210. Theprocessing circuit 210 includes an acquiring unit 211, a sensing unit213, an adjusting unit 215 and a reporting unit 217. Configurations ofthe acquiring unit 211, the sensing unit 213 and the adjusting unit 215are similar to those of the acquiring unit 111, the sensing unit 113 andthe adjusting unit 115 described above with reference to FIG. 1, whichare omitted herein.

The reporting unit 217 is configured to report operation stateinformation of the user equipment to a serving base station for the userequipment in a case that the user equipment is located in a coveragerange of a communication network to which the user equipment belongs.The operation state information includes at least one of timeinformation, position information, and spectrum resource information forthe proximity-based service communication. For example, the reportedinformation together with information reported by other user equipmentsmay be used by the base station to determine an signal intensity over aspecific spectrum resource in a target area, to be provided to a targetuser equipment (not necessarily the user equipment corresponding to theelectronic device 200) to perform parameter adjusting.

FIG. 3 shows a configuration example of an information processingapparatus for user equipment side according to an embodiment of thepresent disclosure. The information processing apparatus 300 includes atransceiving device 310 and a processing circuit 320. The processingcircuit 320 includes an acquiring unit 321, a sensing unit 323 and anadjusting unit 325.

The acquiring unit 321 is configured to control the transceiving device310 to acquire reference information of a signal intensity over aspecific spectrum resource in a predetermined area from a base station.The sensing unit 323 is configured to control the user equipment tosense the signal intensity over the specific spectrum resource in a casethat the user equipment is located in the predetermined area. Theadjusting unit 325 is configured to control the user equipment to adjusta parameter for performing proximity-based service communication in thepredetermined area based on the reference information and the sensedsignal intensity, to achieve a desired communication performance. Theparameter affects an admission rate and/or a transmission reliability ofthe proximity-based service communication.

More detailed configurations of the acquiring unit 321, the sensing unit323 and the adjusting unit 325 are similar to those of the acquiringunit 111, the sensing unit 113 and the adjusting unit 115 describedabove with reference to FIG. 1, which are omitted herein.

In the foregoing description of the embodiments of the presentdisclosure, it is apparent that some processes and methods are alsodisclosed. Next, an information processing method for user equipmentside according to an embodiment of the present disclosure is describedwithout repeating the specific details described above.

As shown in FIG. 4, the information processing method for user equipmentside according to the embodiment includes the following steps S410 toS430.

In S410, reference information of a signal intensity over a specificspectrum resource in a predetermined area is acquired from a basestation.

In S420, in a case that the user equipment is located in thepredetermined area, the signal intensity over the specific spectrumresource is sensed.

In S430, a parameter for performing proximity-based servicecommunication in the predetermined area is adjusted based on thereference information and the sensed signal intensity, to achieve adesired communication performance. The parameter affects an admissionrate and/or a transmission reliability of the proximity-based servicecommunication.

In addition, a device and method for base station side are furtherprovided in the present disclosure.

As shown in FIG. 5, an electronic device 500 for base station sideaccording to an embodiment includes a processing circuit 510. Theprocessing circuit 510 includes an acquiring unit 511 and a transmittingunit 513.

The acquiring unit 511 is configured to control the base station toacquire movement information of a target user equipment.

The transmitting unit 513 is configured to control the base station totransmit reference information of a signal intensity over a specificspectrum resource in a predetermined area and/or a reference value of aparameter for performing proximity-based service communication to thetarget user equipment, if it is determined based on the movementinformation that the target user equipment is about to enter thepredetermined area.

The predetermined area may be, for example, an area not covered by acommunication network to which the target user equipment belongs, sothat the target user equipment can autonomously perform parameteradjusting based on the acquired reference information in the case ofbeing not covered by the network. The specific spectrum resource mayinclude, for example, a spectrum resource dedicated to internet ofvehicles or a spectrum resource over an unlicensed frequency band. Thesignal intensity over the specific spectrum resource may reflect adensity or the number of other user equipments operating over thespecific spectrum resource. In a case that the current user equipmentperforms proximity-based service communication by using the specificspectrum resource in a target area, the other user equipments serve asinterference sources of the proximity-based service communication. Theproximity-based service communication may include, for example, MTC, D2Dcommunication, V2X communication, IOT communication, and the like. Theparameter for performing the proximity-based service communication inthe predetermined area may include, for example, a CCA threshold, afrequency and/or the number of times of transmitting messages, a signaltransmission power.

The base station may acquire the reference information in various ways.For example, the base station may estimate the reference information inthe predetermined area based on historical data of the entire network.Alternatively, the base station may acquire a position and movementinformation of the user equipment that the base station serves to obtainthe number of vehicles entering in the predetermined area, and thenestimates the reference information by using a normal service model.Alternatively, the user equipments may respectively store measurementresults in the target area by themselves, and report the measurementresults to base stations in a case that a signal exists, and themeasurement results may be shared among the base stations, so that thebase station at the edge of the predetermined area can determine thereference information based on the measurement results.

In addition, as described above, in the case that the base station sidecan acquire the position information and spectrum resource informationof the user equipments in the target area, the base station side candetermine mutual interference between the user equipments in the targetarea more accurately compared with the case that the base station sidedetermines based on the foregoing reference information, so that thetarget user equipment can perform the parameter adjusting only based onthe information provided by the base station side.

Accordingly, as shown in FIG. 6, an electronic device 600 for basestation side according to an embodiment includes a processing circuit610. The processing circuit 610 includes an acquiring unit 611, anestimating unit 613 and a transmitting unit 615.

Compared with the acquiring unit 511 described above with reference toFIG. 5, the acquiring unit 611 in this embodiment is further configuredto control the base station to acquire operation state information ofmultiple user equipments from the multiple user equipments. Theoperation state information includes at least one of time Information,position information, and spectrum resource information forproximity-based service communication.

The estimating unit 613 is configured to estimate a density or thenumber of other user equipments (other than the target user equipment)operating over a specific spectrum resource in a predetermined areabased on the acquired operation state information.

Compared with the transmitting unit 513 described above with referenceto FIG. 5, the transmitting unit 615 in this embodiment is furtherconfigured to notify the target user equipment of the estimated densityor the estimated number of the other user equipments.

Thus, the target user equipment can perform parameter adjusting based onthe information provided by the base station side without sensing asignal intensity over the specific spectrum resource.

Next, an example embodiment is described with reference to FIG. 17. Inthe example, the user equipment is a vehicle, and the proximity-basedservice communication is V2X communication. It should be understood thatsome aspects of the example may also be applied in other applicationscenarios.

As shown in FIG. 17, in a process (1), a UE 1720 in a signal coveragerange of an eNB/RSU 1710, for example, periodically reports operationstate information at least including time information and positioninformation to the eNB/RSU 1710, or the UE 1720 further reports toresource pool information used.

In a process (2), the eNB/RSU 1710 estimates a density of network nodesbased on the operation state information, etc. Further, a density ofnetwork nodes in each resource pool may be estimated in conjunction withthe resource pool information used by the network nodes.

In a process (3), the eNB/RSU 1710 transmits the network node densityestimation result and reference information required for adjusting asystem parameter (such as a CCA threshold, a message control parameter,and a power control parameter) to the UE 1720.

In a process (4), the UE 1720 adjusts the CCA threshold, the messagecontrol parameter or the power control parameter based on the networknode density information and the reference information required forsystem parameter adjusting. The specific parameter adjusting manner mayrefer to the examples described above.

FIG. 7 shows a configuration example of an information processingapparatus for base station side according to an embodiment. As shown inFIG. 7, an information processing apparatus 700 includes a transceivingdevice 710 and a processing circuit 720. The processing circuit 720includes an acquiring unit 721 and a transmitting unit 723. Theacquiring unit 721 is configured to control the base station to acquiremovement information of a target user equipment. The transmitting unit723 is configured to control the transceiving apparatus to transmitreference information of a signal intensity over a specific spectrumresource in a predetermined area to the target user equipment, if it isdetermined based on the movement information that the target userequipment is about to enter the predetermined area.

FIG. 8 shows an information processing method for base station sideaccording to an embodiment. The method includes the following steps S810and S820.

In S810, movement information of a target user equipment is acquired.

In S820, if it is determined based on the movement information that thetarget user equipment is about to enter a predetermined area, referenceinformation of a signal intensity over a specific spectrum resource inthe predetermined area and/or a reference value of a parameter forperforming proximity-based service communication are transmitted to thetarget user equipment.

FIG. 9 shows a configuration example of an electronic device for userequipment side according to an embodiment. An electronic device 900includes an acquiring unit 910, a sensing unit 920 and an adjusting unit930. The acquiring unit 910 is configured to control the user equipmentto acquire reference information of a signal intensity over a specificspectrum resource in a predetermined area from a base station. Thesensing unit 920 is configured to control the user equipment to sensethe signal intensity over the specific spectrum resource in a case thatthe user equipment is located in a predetermined area. The adjustingunit 930 is configured to control the user equipment to adjust aparameter for performing proximity-based service communication in thepredetermined area based on the reference information and the sensedsignal intensity, to achieve a desired communication performance. Theparameter affects an admission rate and/or a transmission reliability ofthe proximity-based service communication.

FIG. 10 shows a configuration example of an information processingapparatus for user equipment side according to another embodiment. Aninformation processing apparatus 1000 includes a transceiving unit 1040,an acquiring unit 1010, a sensing unit 1020 and an adjusting unit 1030.The acquiring unit 1010 is configured to control the transceiving unit1040 to acquire reference information of a signal intensity over aspecific spectrum resource in a predetermined area from a base station.The sensing unit 1020 is configured to control the user equipment tosense the signal intensity over the specific spectrum resource in a casethat the user equipment is located in the predetermined area. Theadjusting unit 1030 is configured to control the user equipment toadjust a parameter for performing proximity-based service communicationin the predetermined area based on the reference information and thesensed signal intensity, to achieve a desired communication performance.The parameter affects an admission rate and/or a transmissionreliability of the proximity-based service communication.

FIG. 11 shows an electronic device for base station side according toanother embodiment. An electronic device 1100 includes an acquiring unit1110 and a transmitting unit 1120. The acquiring unit 1110 is configuredto control the base station to acquire movement information of a targetuser equipment. The transmitting unit 1120 is configured to control thebase station to transmit reference information of a signal intensityover a specific spectrum resource in a predetermined area and/or areference value of a parameter for performing proximity-based servicecommunication to the target user equipment, if it is determined based onthe movement information that the target user equipment is about toenter the predetermined area.

FIG. 12 shows an information processing apparatus for base station sideaccording to another embodiment. An information processing apparatus1200 includes a transceiving unit 1230, an acquiring unit 1210 and atransmitting unit 1220. The acquiring unit 1210 is configured to controlthe base station to acquire movement information of a target userequipment. The transmitting unit 1220 is configured to control thetransceiving device to transmit reference information of a signalintensity over a specific spectrum resource in a predetermined areaand/or a reference value of a parameter for performing proximity-basedservice communication to the target user equipment, if it is determinedbased on the movement information that the target user equipment isabout to enter the predetermined area.

As an example, steps of the above-described method and composing modulesand/or units of the above-described device may be implemented assoftware, firmware, hardware, or a combination thereof. In a case ofimplementing by software or firmware, a program constituting thesoftware for implementing the above-described method may be installedfrom a storage medium or a network to a computer (for example, ageneral-purpose computer 2000 shown in FIG. 18) having a dedicatedhardware structure. The computer can perform various functions whenbeing installed with various programs.

In FIG. 18, an arithmetic processing unit (i.e., a CPU) 2001 performsvarious types of processing according to programs stored in a read onlymemory (ROM) 2002 or programs loaded from a storage section 2008 to arandom access memory (RAM) 2003. Data required when the CPU 2001performs various types of processing is stored in the RAM 2003 asneeded. The CPU 2001, the ROM 2002 and the RAM 2003 are linked to eachother via a bus 2004. An input/output interface 2005 is also linked tothe bus 2004.

The following components are linked to the input/output interface 2005:an input section 2006 (including a keyboard, a mouse or the like), anoutput section 2007 (including a display such as a cathode ray tube(CRT), a liquid crystal display (LCD), a speaker or the like), a storagesection 2008 (including a hard disk or the like), and a communicationsection 2009 (including a network interface card such as a LAN card, amodem or the like). The communication section 2009 performscommunication processing via a network such as the Internet. A driver2010 may also be linked to the input/output interface 2005 as needed. Aremovable medium 2011 such as a magnetic disk, an optical disk, amagneto-optical disk and a semiconductor memory may be installed on thedriver 2010 as needed, such that the computer programs read from theremovable medium 2011 are installed in the storage section 2008 asneeded.

In a case that the series of processing described above is implementedby software, programs constituting the software are installed from anetwork such as the Internet or a storage medium such as the removablemedium 2011.

Those skilled in the art should understand that the storage medium isnot limited to the removable medium 2011 shown in FIG. 18 in whichprograms are stored and which is distributed separately from theapparatus to provide the programs to the user. An example of theremovable medium 2011 includes: a magnetic disk (including a floppy disk(registered trademark)), an optical disk (including a compact disk readonly memory (CD-ROM) and a digital versatile disk (DVD)), amagneto-optical disk (including a mini-disk (MD) (registered trademark))and a semiconductor memory. Alternatively, the storage medium may be theROM 2002, a hard disk included in the storage section 2008 or the like.The programs are stored in the storage medium, and the storage medium isdistributed to the user together with the device including the storagemedium.

According to an embodiment of the present disclosure, a program productstoring machine-readable instruction codes is further provided. Whenread and executed by a machine, the instruction codes cause the machineto perform the above-described method according to the embodiment of thepresent disclosure.

Accordingly, a storage medium for carrying the above-described programproduct storing the machine-readable instruction codes is also includedin the present disclosure. The storage medium includes, but not limitedto, a floppy disk, an optical disk, a magneto-optical disk, a storagecard, a memory stick or the like.

The embodiments of the present disclosure further relate to anelectronic device in the following. In a case that the electronic deviceis for base station side, the electronic device may be implemented asany type of evolution Node B (eNB), such as a macro eNB and a small eNB.The small eNB may be an eNB covering a cell smaller than a macro cell,such as a pico eNB, a micro eNB or a home (femto) eNB. Alternatively,the base station may be implemented as any other type of base station,such as a NodeB and a base transceiver station (BTS). The electronicdevice may include: a main body (also referred to as a base stationapparatus) configured to control wireless communication; and one or moreremote radio heads (RRH) arranged at positions different from the mainbody. In addition, various types of terminals described below mayoperate as a base station by performing functions of the base stationtemporarily or in a semi-persistent manner.

In a case that the electronic device is for user equipment side, theelectronic device may be implemented as mobile terminals (such as asmart phone, a tablet personal computer (PC), a notebook PC, a portablegame terminal, a portable/dongle mobile router and a digital camera) ora vehicle terminal (such as a car navigation apparatus). In addition,the electronic device may be a wireless communication module (such as anintegrated circuit module including one or more chips) installed on eachof the above terminals.

[Application Example On Terminal Device]

FIG. 19 is a block diagram showing a schematic configuration example ofa smart phone 2500 to which the technology of the present disclosure maybe applied. The smart phone 2500 includes a processor 2501, a memory2502, a storage 2503, an external connection interface 2504, a camera2506, a sensor 2507, a microphone 2508, an input apparatus 2509, adisplay apparatus 2510, a speaker 2511, a radio communication interface2512, one or more antenna switches 2515, one or more antennas 2516, abus 2517, a battery 2518, and an auxiliary controller 2519.

The processor 2501 may be, for example, a CPU or a system on a chip(SoC), and controls functions of an application layer and another layerof the smart phone 2500. The memory 2502 includes RAM and ROM, andstores a program executed by the processor 2501 and data. The storage2503 may include a storage medium such as a semiconductor memory and ahard disk. The external connection interface 2504 is an interface forconnecting an external apparatus (such as a memory card and a universalserial bus (USB) apparatus) to the smart phone 2500.

The camera 2506 includes an image sensor (such as a charge coupleddevice (CCD) and a complementary metal oxide semiconductor (CMOS)), andgenerates a captured image. The sensor 2507 may include a group ofsensors such as a measurement sensor, a gyro sensor, a geomagneticsensor, and an acceleration sensor. The microphone 2508 converts soundsthat are inputted to the smart phone 2500 to audio signals. The inputapparatus 2509 includes, for example, a touch sensor configured todetect touch onto a screen of the display apparatus 2510, a keypad, akeyboard, a button, or a switch, and receive an operation or informationinputted from a user. The display apparatus 2510 includes a screen (suchas a liquid crystal display (LCD) and an organic light-emitting diode(OLED) display), and displays an output image of the smart phone 2500.The speaker 2511 converts audio signals that are outputted from thesmart phone 2500 to sounds.

The radio communication interface 2512 supports any cellularcommunication scheme (such as LTE and LTE-Advanced), and performswireless communication. The radio communication interface 2512 maytypically include, for example, a base band (BB) processor 2513 and aradio frequency (RF) circuit 2514. The BB processor 2513 may perform,for example, encoding/decoding, modulating/demodulating, andmultiplexing/demultiplexing, and performs various types of signalprocessing for wireless communication. Meanwhile, the RF circuit 2514may include, for example, a mixer, a filter, and an amplifier, andtransmits and receives wireless signals via the antenna 2516. The radiocommunication interface 2512 may be a chip module having the BBprocessor 2513 and the RF circuit 2514 integrated thereon. As shown inFIG. 19, the radio communication interface 2512 may include multiple BBprocessors 2513 and multiple RF circuits 2514. Although FIG. 19 showsthe example in which the radio communication interface 2512 includes themultiple BB processors 2513 and the multiple RF circuits 2514, the radiocommunication interface 2512 may also include a single BB processor 2513or a single RF circuit 2514.

Furthermore, in addition to a cellular communication scheme, the radiocommunication interface 2512 may support another type of wirelesscommunication scheme such as a short-distance wireless communicationscheme, a near field communication scheme, and a wireless local areanetwork (LAN) scheme. In this case, the radio communication interface2512 may include the BB processor 2513 and the RF circuit 2514 for eachwireless communication scheme.

Each of the antenna switches 2515 switches connection destinations ofthe antennas 2516 among multiple circuits (such as circuits fordifferent wireless communication schemes) included in the radiocommunication interface 2512.

Each of the antennas 2516 includes a single or multiple antenna elements(such as multiple antenna elements included in an MIMO antenna), and isused for the radio communication interface 2512 to transmit and receivewireless signals. As shown in FIG. 19, the smart phone 2500 may includethe multiple antennas 2516. Although FIG. 21 shows the example in whichthe smart phone 2500 includes the multiple antennas 2516, the smartphone 2500 may also include a single antenna 2516.

Furthermore, the smart phone 2500 may include the antenna 2516 for eachwireless communication scheme. In this case, the antenna switches 2515may be omitted from the configuration of the smart phone 2500.

The bus 2517 connects the processor 2501, the memory 2502, the storage2503, the external connection interface 2504, the camera 2506, thesensor 2507, the microphone 2508, the input apparatus 2509, the displayapparatus 2510, the speaker 2511, the radio communication interface2512, and the auxiliary controller 2519 to each other. The battery 2518supplies power to blocks of the smart phone 2500 shown in FIG. 10 viafeeder lines that are partially shown as dashed lines in the FIG. 19.The auxiliary controller 2519 operates a minimum necessary function ofthe smart phone 2500, for example, in a sleep mode.

In the smart phone 2500 shown in FIG. 19, the transceiving device or thetransceiving unit in the information processing apparatus for userequipment side according to the embodiment of the present disclosure maybe implemented by the radio communication interface 2512. At least partof functions of the processing circuit and/or the units in theelectronic device or the information processing apparatus for userequipment side according to the embodiment of the present disclosure mayalso be implemented by the processor 2501 or the auxiliary controller2519. For example, the power consumption of the battery 2518 may bereduced by the auxiliary controller 2519 performing part of thefunctions of the processor 2501. In addition, the processor 2501 or theauxiliary controller 2519 may execute at least part of the functions ofthe processing circuit and/or the units in the electronic device or theinformation processing apparatus for user equipment side according tothe embodiment of the present disclosure by executing the programsstored in the memory 2502 or the storage 2503.

[Application Example On Base Station]

FIG. 20 is a block diagram showing a schematic configuration example ofan eNB to which the technology of the present disclosure may be applied.An eNB 2300 includes one or more antennas 2310 and a base stationapparatus 2320. The base station apparatus 2320 and each antenna 2310may be connected to each other via an RF cable.

Each of the antennas 2310 includes a single or multiple antenna elements(such as multiple antenna elements included in a multi-inputmulti-output (MIMO) antenna), and is used for the base station apparatus2320 to transmit and receive wireless signals. As shown in FIG. 20, theeNB 2300 may include the multiple antennas 2310. For example, themultiple antennas 2310 may be compatible with multiple frequency bandsused by the eNB 2300. Although FIG. 20 shows the example in which theeNB 2300 includes the multiple antennas 2310, the eNB 2300 may alsoinclude a single antenna 2310.

The base station apparatus 2320 includes a controller 2321, a memory2322, a network interface 2323, and a radio communication interface2325.

The controller 2321 may be, for example, a CPU or a DSP, and operatesvarious functions of a higher layer of the base station apparatus 2320.For example, the controller 2321 generates a data packet from data insignals processed by the radio communication interface 2325, andtransfers the generated packet via the network interface 2323. Thecontroller 2321 may bundle data from multiple base band processors togenerate the bundled packet, and transfer the generated bundled packet.The controller 2321 may have logical functions of performing controlsuch as radio resource control, radio bearer control, mobilitymanagement, admission control and scheduling. The control may beperformed in corporation with an eNB or a core network node in thevicinity. The memory 2322 includes a RAM and a ROM, and stores a programexecuted by the controller 2321, and various types of control data (suchas a terminal list, transmission power data, and scheduling data).

The network interface 2323 is a communication interface for connectingthe base station apparatus 2320 to a core network 2324. The controller2321 may communicate with a core network node or another eNB via thenetwork interface 2323. In this case, the eNB 2300, and the core networknode or the other eNB may be connected to each other via a logicalinterface (such as an S1 interface and an X2 interface). The networkinterface 2323 may also be a wired communication interface or a radiocommunication interface for wireless backhaul. If the network interface2323 is a radio communication interface, the network interface 2323 mayuse a higher frequency band for wireless communication than a frequencyband used by the radio communication interface 2325.

The radio communication interface 2325 supports any cellularcommunication scheme (such as Long Term Evolution (LTE) andLTE-Advanced), and provides wireless connection to a terminal positionedin a cell of the eNB 2300 via the antenna 2310. The radio communicationinterface 2325 may typically include, for example, a BB processor 2326and an RF circuit 2327. The BB processor 2326 may perform, for example,encoding/decoding, modulating/demodulating, andmultiplexing/demultiplexing, and performs various types of signalprocessing of layers (such as L1, medium access control (MAC), wirelesslink control (RLC), and a packet data convergence protocol (PDCP)). TheBB processor 2326 may have a part or all of the above-described logicalfunctions instead of the controller 2321. The BB processor 2326 may be amemory that stores a communication control program, or a module thatincludes a processor and a related circuit configured to execute theprogram. Updating the program may allow the functions of the BBprocessor 2326 to be changed. The module may be a card or a blade thatis inserted into a slot of the base station apparatus 2320.Alternatively, the module may also be a chip that is mounted on the cardor the blade. Meanwhile, the RF circuit 2327 may include, for example, amixer, a filter, and an amplifier, and transmits and receives wirelesssignals via the antenna 2310.

As shown in FIG. 20, the radio communication interface 2325 may includethe multiple BB processors 2326. For example, the multiple BB processors2326 may be compatible with multiple frequency bands used by the eNB2300. As shown in FIG. 20, the radio communication interface 2325 mayinclude the multiple RF circuits 2327. For example, the multiple RFcircuits 2327 may be compatible with multiple antenna elements. AlthoughFIG. 20 shows the example in which the radio communication interface2325 includes the multiple BB processors 2326 and the multiple RFcircuits 2327, the radio communication interface 2325 may also include asingle BB processor 2326 or a single RF circuit 2327.

In the eNB 2300 shown in FIG. 20, the transceiving device or thetransceiving unit in the information processing apparatus for basestation side according to the embodiment of the present disclosure maybe implemented by the radio communication interface 2325. At least partof functions of the processing circuit and/or the units in theelectronic device or the information processing apparatus for basestation side according to the embodiment of the present disclosure mayalso be implemented by the controller 2321. For example, the controller2321 may execute at least part of the functions of the processingcircuit and/or the units in the electronic device or the informationprocessing apparatus for base station side according to the embodimentof the present disclosure by executing the programs stored in the memory2322.

[Application Example On Car Navigation Apparatus]

FIG. 21 is a block diagram showing a schematic configuration example ofa car navigation apparatus 2120 to which the technology of the presentdisclosure may be applied. The car navigation apparatus 2120 includes aprocessor 2121, a memory 2122, a global positioning system (GPS) module2124, a sensor 2125, a data interface 2126, a content player 2127, astorage medium interface 2128, an input apparatus 2129, a displayapparatus 2130, a speaker 2131, a radio communication interface 2133,one or more antenna switches 2136, one or more antennas 2137, and abattery 2138.

The processor 2121 may be, for example, a CPU or a SoC, and controls anavigation function and another function of the car navigation apparatus2120. The memory 2122 includes a RAM and a ROM, and stores a programexecuted by the processor 2121 and data.

The GPS module 2124 determines a position (such as latitude, longitude,and altitude) of the car navigation apparatus 2120 by using GPS signalsreceived from a GPS satellite. The sensor 2125 may include a group ofsensors such as a gyro sensor, a geomagnetic sensor, and an air pressuresensor. The data interface 2126 is connected to, for example, anin-vehicle network 2141 via a terminal that is not shown, and acquiresdata (such as vehicle speed data) generated by the vehicle.

The content player 2127 reproduces content stored in a storage medium(such as a CD and a DVD) that is inserted into the storage mediuminterface 2128. The input apparatus 2129 includes, for example, a touchsensor configured to detect touch onto a screen of the display apparatus2130, a button or a switch, and receives an operation or informationinputted from a user. The display apparatus 2130 includes a screen suchas a LCD or an OLED display, and displays an image of the navigationfunction or content that is reproduced. The speaker 2131 outputs soundsof the navigation function or the content that is reproduced.

The radio communication interface 2133 supports any cellularcommunication scheme (such as LTE and LTE-Advanced), and performswireless communication. The radio communication interface 2133 maytypically include, for example, a BB processor 2134 and an RF circuit2135. The BB processor 2134 may perform, for example, encoding/decoding,modulating/demodulating, and multiplexing/demultiplexing, and performsvarious types of signal processing for wireless communication.Meanwhile, the RF circuit 2135 may include, for example, a mixer, afilter, and an amplifier, and transmits and receives wireless signalsvia the antenna 2137. The radio communication interface 2133 may also bea chip module having the BB processor 2134 and the RF circuit 2135integrated thereon. As shown in FIG. 21, the radio communicationinterface 2133 may include the multiple BB processors 2134 and themultiple RF circuits 2135. Although FIG. 21 shows the example in whichthe radio communication interface 2133 includes the multiple BBprocessors 2134 and the multiple RF circuits 2135, the radiocommunication interface 2133 may also include a single BB processor 2134or a single RF circuit 2135.

Furthermore, in addition to the cellular communication scheme, the radiocommunication interface 2133 may support another type of wirelesscommunication scheme such as a short-distance wireless communicationscheme, a near field communication scheme, and a wireless LAN scheme. Inthis case, the radio communication interface 2133 may include the BBprocessor 2134 and the RF circuit 2135 for each wireless communicationscheme.

Each of the antenna switches 2136 switches connection destinations ofthe antennas 2137 among multiple circuits (such as circuits fordifferent wireless communication schemes) included in the radiocommunication interface 2133.

Each of the antennas 2137 includes a single or multiple antenna elements(such as multiple antenna elements included in an MIMO antenna), and isused for the radio communication interface 2133 to transmit and receivewireless signals. As shown in FIG. 21, the car navigation apparatus 2120may include the multiple antennas 2137. Although FIG. 21 shows theexample in which the car navigation apparatus 2120 includes the multipleantennas 2137, the car navigation apparatus 2120 may also include asingle antenna 2137.

Furthermore, the car navigation apparatus 2120 may include the antenna2137 for each wireless communication scheme. In this case, the antennaswitches 2136 may be omitted from the configuration of the carnavigation apparatus 2120.

The battery 2138 supplies power to blocks of the car navigationapparatus 2120 shown in FIG. 21 via feeder lines that are partiallyshown as dashed lines in the FIG. 21. The battery 2138 accumulates powersupplied form the vehicle.

In the car navigation apparatus 2120 shown in FIG. 21, the transceivingdevice or the transceiving unit in the information processing apparatusfor user equipment side according to the embodiment of the presentdisclosure may be implemented by the radio communication interface 2133.At least part of functions of the processing circuit and/or the units inthe electronic device or the information processing apparatus for userequipment side according to the embodiment of the present disclosure mayalso be implemented by the processor 2121.

The technology of the present disclosure may also be implemented as anin-vehicle system (or a vehicle) 2140 including one or more blocks ofthe car navigation apparatus 2120, the in-vehicle network 2141 and avehicle module 2142. The vehicle module 2142 generates vehicle data(such as a vehicle speed, an engine speed or failure information), andoutputs the generated data to the in-vehicle network 2141.

In the above description of specific embodiments of the presentdisclosure, the features described and/or illustrated with respect toone embodiment may be used in one or more other embodiments in the sameor similar manner, may be combined with features in other embodiments,or may replace features in other embodiments.

It should be noted that the term “comprising/including” as used hereinrefers to the presence of a feature, element, step, or component, butdoes not exclude the presence or addition of one or more other features,elements, steps or components.

In the above embodiments and examples, reference numerals consist ofnumerals are used to represent steps and/or units. It should beunderstood by those skill in the art that the reference numerals areused only for facilitating description and illustration and are notintended to represent an order or limit in any other manner.

In addition, the method of the present disclosure is not limited to beperformed in a chronological order described in the specification, butmay also be performed in other chronological order, in parallel orindependently. Therefore, the order for executing the method describedin this specification does not limit the technical scope of the presentdisclosure.

Although the present disclosure has been described by specificembodiments according to the present disclosure, it should be understoodthat all of the embodiments and examples described above areillustrative and not restrictive. Various modifications, improvements orequivalents of the present disclosure may be designed by those skilledin the art from the spirit and the scope of the appended claims. Suchmodifications, improvements or equivalents shall be construed as beingincluded within the scope of protection of the present disclosure.

1. An electronic device for user equipment, the electronic devicecomprising: a processing circuit configured to: acquire, from a basestation, reference information of a signal intensity over a specificspectrum resource in a predetermined area; sense, the signal intensityover the specific spectrum resource in a case that the user equipment islocated in the predetermined area; and adjust, based on the referenceinformation and the sensed signal intensity, a parameter for performingproximity-based service communication in the predetermined area, whereinthe predetermined area indicates the area that UE can use the resourcepool, to achieve a desired communication performance.
 2. The electronicdevice according to claim 1, wherein the parameter affects an admissionrate and/or a transmission reliability of the proximity-based servicecommunication.
 3. The electronic device according to claim 1, whereinthe reference information comprises a maximum signal intensity that istolerable by the user equipment in a case that the user equipmentoperates with a current reference value of the parameter and apredetermined admission rate and/or transmission reliability of theproximity-based service communication over the specific spectrumresource is met.
 4. The electronic device according to claim 1, whereinthe predetermined area is an area not covered by a communication networkto which the user equipment belongs.
 5. The electronic device accordingto claim 1, wherein the signal intensity over the specific spectrumresource reflects a density or the number of other user equipmentsoperating over the specific spectrum resource, the other user equipmentsserving as interference sources of the proximity-based servicecommunication.
 6. The electronic device according to claim 1, whereinthe parameter comprises one or more of: a clear channel assessmentthreshold for accessing the specific spectrum resource; a frequencyand/or the number of times of transmitting messages by using theproximity-based service communication; and a signal transmission powerof the proximity-based service communication.
 7. The electronic deviceaccording to claim 1, wherein the adjusting comprises: adjusting theparameter in a predetermined range.
 8. The electronic device accordingto claim 1, wherein the adjusting comprises: adjusting the parameterwith an offset obtained based on the reference information and thesensed signal intensity.
 9. The electronic device according to claim 1,wherein the adjusting comprises: adjusting the parameter based on aservice priority of the proximity-based service communication, such thatthe admission rate and/or transmission reliability of a high priorityservice reaches a predetermined level.
 10. The electronic deviceaccording to claim 1, wherein the specific spectrum resource comprises aspectrum resource dedicated to vehicles communication and a spectrumresource over an unlicensed frequency band.
 11. The electronic deviceaccording to claim 1, wherein the processing circuit is furtherconfigured to control the user equipment to acquire a reference value ofthe parameter from the base station.
 12. The electronic device accordingto claim 10, wherein the reference value of the parameter is setindividually for different resource pools.
 13. The electronic deviceaccording to claim 1, wherein the processing circuit is configured tocontrol the user equipment to perform the sensing and the adjusting,periodically or in a case that a predetermined triggering condition ismet.
 14. The electronic device according to claim 12, wherein thepredetermined triggering condition comprises a condition that nospectrum resource for the proximity-based service communication is foundin a preset time period.
 15. The electronic device according to claim 1,wherein the processing circuit is further configured to: report, to aserving base station for the user equipment, operation state informationof the user equipment when being located in the predetermined area, in acase that the user equipment is located in a coverage range of acommunication network to which the user equipment belongs, the operationstate information comprising at least one of time information, positioninformation, and spectrum resource information for the proximity-basedservice communication.
 16. The electronic device according to claim 14,wherein the time information comprises a time period during which thespectrum resource is used by the user equipment.
 17. The electronicdevice according to claim 1, wherein the proximity-based servicecommunication comprises machine type communication MTC, device-to-deviceD2D communication, vehicle-to-everything V2X communication, internet ofthings IOT communication.
 18. An information processing method for userequipment, the information processing method comprising: acquiring, bythe user equipment from a base station, reference information of asignal intensity over a specific spectrum resource in a predeterminedarea; sensing the signal intensity over the specific spectrum resource;and configuring or reconfiguring, based on the reference information andthe sensed signal intensity, a parameter for performing proximity-basedservice communication in the predetermined area, to achieve a desiredcommunication performance, wherein the parameter affects an admissionrate and/or a transmission reliability of the proximity-based servicecommunication.
 19. The information processing method to claim 18,wherein the reference information comprises a maximum signal intensitythat is tolerable by the user equipment in a case that the userequipment operates with a current reference value of the parameter and apredetermined admission rate and/or transmission reliability of theproximity-based service communication over the specific spectrumresource is met.
 20. The information processing method to claim 18,wherein the signal intensity over the specific spectrum resourcereflects a density or the number of other user equipments operating overthe specific spectrum resource, the other user equipments serving asinterference sources of the proximity-based service communication.